航空学报 > 2023, Vol. 44 Issue (8): 127446-127446   doi: 10.7527/S1000-6893.2022.27446

基于多项式混沌法的翼型不确定性分析及梯度优化设计

陈艺夫1, 马宇航1, 蓝庆生2, 孙卫平3, 史亚云4, 杨体浩1(), 白俊强1   

  1. 1.西北工业大学 航空学院,西安 710072
    2.中国空气动力研究与发展中心 计算空气动力研究所,绵阳 621000
    3.中航通飞华南飞机工业有限公司,珠海 519000
    4.西安交通大学 航空学院,西安 710049
  • 收稿日期:2022-05-15 修回日期:2022-06-06 接受日期:2022-06-28 出版日期:2023-04-25 发布日期:2022-07-08
  • 通讯作者: 杨体浩 E-mail:yangtihao@nwpu.edu.cn
  • 基金资助:
    国家自然科学基金(1200021118)

Uncertainty analysis and gradient optimization design of airfoil based on polynomial chaos expansion method

Yifu CHEN1, Yuhang MA1, Qingsheng LAN2, Weiping SUN3, Yayun SHI4, Tihao YANG1(), Junqiang BAI1   

  1. 1.School of Aeronautics,Northwestern Polytechnical University,Xi’an 710072,China
    2.Computational Aerodynamics Institute,China Aerodynamics Research and Development Center,Mianyang 621000,China
    3.AVIC Tongfei South China Aircraft Industry,Zhuhai 519000,China
    4.School of Aeronautics,Xi’an Jiaotong University,Xi’an 710049,China
  • Received:2022-05-15 Revised:2022-06-06 Accepted:2022-06-28 Online:2023-04-25 Published:2022-07-08
  • Contact: Tihao YANG E-mail:yangtihao@nwpu.edu.cn
  • Supported by:
    National Natural Science Foundation of China(1200021118)

摘要:

耦合伴随方法和非嵌入式多项式混沌法,发展了高效、可靠的不确定性梯度优化设计方法。利用伴随方程法求解目标函数对不确定性变量的导数,发展了一种梯度增强型多项式混沌法。通过亚声速和跨声速下等多种算例可以证明该方法可以提高不确定性分析的效率和精度。同时,利用基于方差分解的全局敏感性分析方法对不确定性变量的敏感性进行了量化。建立了多项式混沌耦合伴随方程的统计矩梯度求解方法,并结合梯度增强型多项式混沌法搭建不确定性梯度优化设计系统。基于该优化设计系统对二维低亚声速和跨声速翼型开展确定性及不确定性优化设计研究。优化结果显示,相比于确定性优化设计,不确定性优化设计通过合理权衡确定性性能和不确定性性能,可提高抵抗马赫数和迎角不确定性扰动的能力,同时优化性能均值和标准差。其中阻力系数均值最大可降低17%,阻力系数标准差最大可降低80%。而确定性优化设计可能导致性能鲁棒性的降低。

关键词: 多项式混沌法, 伴随方程, 不确定性分析, 梯度优化设计, 翼型

Abstract:

An efficient and reliable uncertainty gradient optimization design method is developed by coupling the adjoint method and the non-intrusive polynomial chaos method. Using the adjoint equation method to solve the derivative of the objective function with respect to the uncertain variable, we develop a gradient-enhanced polynomial chaos expansion method. Various examples at subsonic and transonic speeds prove that this method can improve the efficiency and accuracy of uncertainty analysis. Meanwhile, the sensitivity of uncertain variables is quantified using a global sensitivity analysis method based on variance decomposition. A statistical moment gradient solution method for the coupled adjoint equation of polynomial chaos is established, and an uncertain gradient optimization design system built by combining the gradient-enhanced polynomial chaos expansion method. Based on the optimization design system, the deterministic and uncertain optimization design research of two-dimensional low subsonic and transonic airfoils is conducted. The optimization results show that, compared with the deterministic optimal design, the uncertain optimal design can improve the ability to resist the uncertainty perturbation of Mach number and angle of attack by reasonably balancing the deterministic performance and the uncertain performance, and optimize the average performance and performance robustness. The mean value and the standard deviation of the drag coefficient can be reduced by up to 17% and 80%, respectively. The deterministic optimization design may lead to a decrease in performance robustness.

Key words: polynomial chaos expansion, adjoint equations, uncertainty analysis, gradient optimization design, airfoil

中图分类号: